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MAX797C/D датащи(PDF) 27 Page - Maxim Integrated Products |
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MAX797C/D датащи(HTML) 27 Page - Maxim Integrated Products |
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27 / 32 page ![]() Step-Down Controllers with Synchronous Rectifier for CPU Power ______________________________________________________________________________________ 27 MAX473 V+ INPUT 4.5V TO 30V Q1 Si9433DY OR MMSF4P01 82pF VL (5V) 20pF 1k 100k, 1% 1.5k 16k, 1% REF (2.505V) MAIN 3.3V OUTPUT (CSL) +3.3V MAIN OUTPUT +2.9V OUTPUT AT 2A STANDARD 3.3V CIRCUIT 10 μF10μF MAX797 SANYO OS-CON Figure 14. 2.9V Low-Dropout Linear Regulator with Fast Transient Response MAX797 CSL CSH VL SYNC REF GND V+ Q1 FB 100k 100k +5V AT 1A BST DH LX DL PGND 2N7002 OPTIONAL SYNC AND LOW-VOLTAGE START-UP CIRCUIT SKIP SHDN VIN 2.5V TO 5.25V C2 100 μF C3 100 μF 0.33 μF 0.033 Ω 0.01 μF C1 100 μF D1 1N4148 190kHz - 340kHz 1N4148 +3.3V (EXTERNAL) 33k 4.7 μF L1 5 μH 0.1 μF L1 = SUMIDA CDRH125, 5 μH D1 = MOTOROLA MBR130 C1 - C3 = AVX TPS 100 μF, 10V Q1 = SILICONIX Si9936 (BOTH SECTIONS) OR MOTOROLA MMDF3N03L Figure 15. Low-Noise Boost Converter for Cellular Phones ____________________________________________Application Circuits (continued) |
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